7 Biggest Questions For The POI Series Finale

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Was Greer's sacrifice in vain?

In ".exe," Greer gave his life so that Samaritan might live. While he planned to take Finch down with him, his plans were thwarted when Reese, Shaw, and The Machine saved their leader's life. If Finch is able to shut down Samaritan, will Greer have killed himself for nothing?